Microwave Attenuation and Phase Rotation by Ellipsoidal Dust Particles
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Date
2018
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Abstract
Electromagnetic wave propagation suffers attenuation and phase rotation by suspended dust
particles especially in arid and semi-arid regions where occurrence of sand and dust storms (SDS) is
predominant. The SDS phenomenon has received considerable interest in recent times with emphasis on
signal attenuation and phase rotation effects. To this end, mathematical models of dust induced complex
scattering are developed and proposed in this paper using Rayleigh method to compute attenuation
and phase rotation of electromagnetic waves by considering dust particle shapes and best fit ellipsoids.
This work also presents a new expression for the relation between visibility and dust concentration. The
expression was included in the proposed models whose simulated results, compared with some published
results, show close agreement. Attenuation and phase rotation in dry dust are found to be significant
only when visibility becomes severe or at increased microwave bands.